Automatic switch.



No. 700,386. Patented May 20. |902.

J. A. TANCDCK &. T. C. CDGHRILL.

AUTOMATIC SWITCH.

\App1ication led Max-. 16, 1901.)

(No Model.)

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g UNITED STAT-Es 1PATENT j Qrrlcn.. i

JAMES A. TANoocK AND Tirelli/ls c. coc-Hariri., or LONDON, cAlvAlna,

' AUTOMATIC swlTol-l.v

SPECIFCATION forming part of Letters :Patent No. 700,386, dated May 20, 1902.

Application sled Mmh 1e. 1901. serial No. Blase. ci@ modelo To all when@ it may concern:

`Veterinary surgeon, and THOMAS C. COCH- lRILL, mail clerk, British subjects, and residents of the city of London, inthe county of Middlesex, Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Automatic Switches; and we do hereby declare the following is a full, clear, and exact description of the same.

Our invention relates to improvements in automatic switches; and it has for its objects, among others, to provide improved means whereby the motorman is enabled to turn the switch-rail from the car platform or vestibule, and thereby save time and trouble.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be specifically definedY by the appended claims.

The invention is clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this specification, and in Which- Fgure l is a side elevation sllowing the application of the invention. Fig. 2 is a vertical section, on an enlarged scale, with the cam-wheel and other parts in elevation. Fig. 3 is a vertical section at. right angles t-o Fig. 2. Fig. ,4 is a detail showing the cam-pin and spring.

Like lett-ers of reference indicate like parts throughout the severalviews.

Referring now to the drawings, A designates the head-block or casing supported in any suitable manner from the truck I-I of the car in advance of the wheels. This headblock or casing consists of a square socket, the

upper end of which is a perfect square, the

lower end being oblong, as seen in Fig. 3, to

,allow of a lateral movement of the plungers,

which plungers B and C are disposed one within the other and both Within'the said casing or head-block, as shown. The upper end of the plunger Bis offset laterally, as seen at B in Fig. 2. rlfhe lower end of this plunger B carries the pivoted foot D, the spring D serving to allow of the necessary'movement and tending to keep the said foot normally in position with its shank in verticalalincment Be it known that We, JAMES A. ,'IA'NCOCK,l

with the plunger.

E is a springinterposed.between the casing for head-block A and the plunger C, as seen best .in Fig.` 3.

The plunger C is square to correspond with its upper end has the lateral projection J,

r5sl the 'socket ofthe casing or head-block and at carryingat its free end an antifriction-roller,

moves in a correspondingly-shaped socket in the plunger C, and its portion B is operatedl by the pin F, disposed at right angles. from the extended end of the shaft K, carrying the.

cam-wheel G and mounted in suitable bear ings. whichmeshes with a bevel-gear M on the vertical shaft N, adapted to extend to the vestibule of the car, where it may be operated by the motorman, as will be readily understood, the vestibulenot being illustrated. The resistance of said spring being sufiicient to firmly hold the lower end of the plunger in propel' position to move the freeend of the switch-rail, at the same time if said lowerend of said plunger should meet with a rigid and immovable obstruction or object in itspath, said object being rigid, would overcome the resistanceof said spring which would permit the lower pivotal end of thel plunger to move upward and backward ina pivotal direction, until itcleared said rigid obstruction, at the same time said spring would be compressed, so that as soon as said lower end of said plungerpassed over, and was free from said obstruction said spring would expand, and return the lower end of said plunger to its normal position to operato the switch-rail.

The plungers B and C are operated by means of cam-Wheel on a shafting K, running from cam-wheel underneath front platform of car, to which is attached beveled gear, and the Whole operated from the vestibule. The calnwheel is also provided with a stop-pin supported on either side-by a spring, Fig. 4, letter F, to lnove plunger laterally into groove,

This shaft K carries a bevel-gear L, Y

behind switch-rail, after the pivotal foot of plunger has been turned by the beveled gear as far as it will go (it being against the side of rail) before it comes to the groove occupied by the switch-rail.

What we claim as our invention, and desire to secure by Letters Patent, is

1. In an automatic switch, the combination of a head-block, two independent plungers vertically movable therein, a pivoted foot carried byone of said plungers, a cam-wheel and connections between said cam-wheel and each of said plungers for reciprocating the same.

2. In an automatic switch, the combination ot' a head-block, two independently-movable plungers working therein, a pivoted foot carried by the innermost plunger, a cam-wheel, connections between the same and the plungers, for reciprocating the latter, and a spring acting on said foot to keep it normally `in a predetermined position, as set forth.

3. In an automatic switch, the com bin ation of a head-block, two independently-movable plungers therein, a pivoted foot on one of the plungers, a cam-wheel with groove, a projection on the outer plunger movable in said groove and an oliset on the other plunger actuated by means on the shaft of said camwheel, as set forth.

4. In an automatic switch, the combination v of a head-block supported from thc car-truck,

and having socket square atits upper end and oblong at its lower end, plungers in said headblock, one within the other, a spring in the head-block bearing against the outermost plunger, lateral projections on said plnngers, and a cam-wheel and connections for engaging both of said projections to operate the plungers, as set forth.

5. In an automatic switch, the combination of a head-block having 'socket square at its upper end and oblong at its lower end, two independently-movable plungers within the head-block, one Within the other, a spring in the head-block acting on the outermost plunger, lateral projections on the plungers at their upper ends, a cam-Wheel and connections for engaging the said projections to operate the plungers, the outer plunger being square and the inner one round and working in a correspondingly-shaped socket in the outer plunger and springs on opposite sides of the pin that engages the projection of the inner plunger, all substantially as shown and described.

Dated at London this 6th day of Marcil, A. D. 1901.

JAMES A. TANCOCK. TllOS. C. COCHRILI.. In presence of- .T. W. G. WINNETT, L. M. HUTsoN. 

